In the electrolysis of CuCl2 solution using Cu electrodes, the weight of Cu anode increased by 2 gram at cathode. In the anode,
Correct answer: D. 2 gram of copper goes into solution as Cu2+
- A. 0.2 mole of Cu2+ will go into solution
- B. 560 ml O2 is liberated
- C. No loss in weight
- D. 2 gram of copper goes into solution as Cu2+
Explanation
During the electrolysis of CuCl2 using copper electrodes, copper at the anode is oxidized to Cu2+ ions, which go into solution. This results in a decrease in the mass of the anode. Specifically, 2 grams of copper dissolve from the anode, resulting in a corresponding increase in mass at the cathode as copper ions are reduced back to solid copper. The statement that 2 grams of copper goes into solution as Cu2+ is correct.Option A is incorrect because 0.2 mole of copper ions does not correspond to 2 grams of copper, given copper's molar mass. Option B is incorrect because oxygen is not produced in this process, as we are not electrolyzing water. Option C is incorrect as there is indeed a loss in weight at the anode.
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